Performances of laser-arc hybrid welded high strength steel
XU Guo-jian
LI Xiang
XING Fei
LIU Xiang-yu
CHANG Li-li
KUTSUNA Muneharu
Abstract：In order to investigate the effect of welding parameter on the performances of laser-arc hybrid welding,a 2 kW fiber laser and metal active-gas welding (MAG)were used to weld 780 MPa high strength steel plate.The mode of metal transfer and morphology of plasma obtained by laser leading or arc leading were observed with a high-speed camera.The effect of characteristics of laser leading or arc leading, laser-arc distance,defocusing distance,MAG current and mode of metal transfer on the performances of laser-arc hybrid welding was investigated.The results show that a better weld bead formation is gained by the arc-leading.The plasma not only affects the weld bead shape,but also influences the optimum laser-arc distance.The laser-arc distance has no significant effect on the bead width,while the welding current will affect the bead shape and penetration.With increasing the welding current,the penetration increases.The maximum penetration is obtained when the defocusing distance is -2 mm.
Keywords：laser-arc hybrid weldingfiber laserhigh strength steelhigh speed camerametal transferplasmadefocusing distanceweld bead shape
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 647-651 )